1.4.2 Pressure BEST

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1.4.2 Pressure BEST

For further guidance on using these questions see: https://www.stem.org.uk/best-evidence-science-teaching

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Diagnostic questions

Increasing the pressure

Which of these will increase the pressure of air in the balloon? Choose all the correct answers.

3 points

Squashing air

These statements are about what happens when air is squashed in the syringe. What do you think about each statement?

3 points

I am sure this is right

I think this is right

I think this is wrong

I am sure this is wrong

A Particles of air are pushed closer together along the length of the syringe.

B Particles of air are pushed closer together across the width of the syringe.

C Particles of air in the syringe bounce off each equally hard in all directions.

Clear selection

More pressure

Where in the syringe does the air have the biggest pressure?

1 point

Clear selection

Hot air

1) The temperature of the air in the can is increased by heating. What happens to the speed of the particles of air?

1 point

A The particles move more quickly.

B The particles keep moving at the same speed.

C The particles move more slowly.

Clear selection

2) What does heating do to the pressure of air in the can?

1 point

A Pressure becomes bigger.

B Pressure stays the same.

C Pressure becomes smaller.

Clear selection

3) Which diagram best shows what heating does to the distribution of particles in the can?

1 point

Clear selection

Cold air

The temperature of air in the can is lowered by putting it into a freezer. The statements below are about the air after it has cooled down. What do you think about each statement?

4 points

I am sure this is right

I think this is right

I think this is wrong

I am sure this is wrong

A Particles are closer together.

B Particles hit the can with less force.

C Particles collide with each other less often.

D The pressure of the air is smaller.

Clear selection

Doubling up

What happens if the amount of gas is doubled and the volume is doubled?

1 point

A Pressure of the gas: Goes up. | Force on the walls of the box: Goes up.

B Pressure of the gas: Goes up. | Force on the walls of the box: Stays the same.

C Pressure of the gas: Stays the same. | Force on the walls of the box: Goes up.

D Pressure of the gas: Stays the same. | Force on the walls of the box: Stays the same.

Clear selection

Force and pressure

a) Which changes would make the force on the object the biggest?

1 point

A Triple the pressure – nothing else.

B Double the pressure and double the size of the object.

C Double the pressure and halve the size of the object.

D Triple the size of the object – nothing else.

Clear selection

b) Which equation best explains your answer to the last question?

1 point

Clear selection

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